#include<stdio.h>
#include<math.h>

int main()
{
 int Xa,Ya,Xb,Yb;
 scanf("%d %d %d %d",&Xa,&Ya,&Xb,&Yb);
 int x,y;
 x=(Xa+Xb)/2.0;
 double l=(pow((Xb-Xa),2)+pow((Yb-Ya),2))/4.0;
 int flag=1;
 int f;
 for(x;flag;x++)
 {
  y=-(Xb-Xa)/(1.0*(Yb-Ya))*(x-(Xa+Xb)/2.0)+(Ya+Yb)/2.0;
  double d=pow((x-(Xa+Xb)/2.0),2)+pow((y-(Ya+Yb)/2.0),2);
  if(d==l)
  {
   f=1;
   break;
  }
  if(d>l)
  {
   f=0;
   break;
  }
 }
 if(f==1)
 {
  printf("%d %d",x,y);
 }
 else if(f==0)
 {
  printf("No Answer!");
 }
 return 0;
}